Alexey Samsonov | 1f3c2fe | 2013-05-29 09:15:39 +0000 | [diff] [blame] | 1 | //===-- sanitizer_allocator_internal.h -------------------------- C++ -----===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This allocator is used inside run-times. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #ifndef SANITIZER_ALLOCATOR_INTERNAL_H |
| 15 | #define SANITIZER_ALLOCATOR_INTERNAL_H |
| 16 | |
| 17 | #include "sanitizer_allocator.h" |
| 18 | #include "sanitizer_internal_defs.h" |
| 19 | |
| 20 | namespace __sanitizer { |
| 21 | |
Alexey Samsonov | 616659a | 2013-05-29 09:40:07 +0000 | [diff] [blame] | 22 | // FIXME: Check if we may use even more compact size class map for internal |
Alexey Samsonov | 1f3c2fe | 2013-05-29 09:15:39 +0000 | [diff] [blame] | 23 | // purposes. |
| 24 | typedef CompactSizeClassMap InternalSizeClassMap; |
| 25 | |
| 26 | static const uptr kInternalAllocatorSpace = 0; |
| 27 | #if SANITIZER_WORDSIZE == 32 |
| 28 | static const u64 kInternalAllocatorSize = (1ULL << 32); |
| 29 | static const uptr kInternalAllocatorRegionSizeLog = 20; |
| 30 | #else |
| 31 | static const u64 kInternalAllocatorSize = (1ULL << 47); |
| 32 | static const uptr kInternalAllocatorRegionSizeLog = 24; |
| 33 | #endif |
| 34 | static const uptr kInternalAllocatorFlatByteMapSize = |
| 35 | kInternalAllocatorSize >> kInternalAllocatorRegionSizeLog; |
| 36 | typedef SizeClassAllocator32< |
| 37 | kInternalAllocatorSpace, kInternalAllocatorSize, 16, InternalSizeClassMap, |
| 38 | kInternalAllocatorRegionSizeLog, |
| 39 | FlatByteMap<kInternalAllocatorFlatByteMapSize> > PrimaryInternalAllocator; |
| 40 | |
| 41 | typedef SizeClassAllocatorLocalCache<PrimaryInternalAllocator> |
| 42 | InternalAllocatorCache; |
| 43 | |
| 44 | // We don't want our internal allocator to do any map/unmap operations. |
| 45 | struct CrashOnMapUnmap { |
| 46 | void OnMap(uptr p, uptr size) const { |
Alexey Samsonov | 845abaf | 2013-05-29 10:41:53 +0000 | [diff] [blame^] | 47 | RAW_CHECK_MSG(0, "Unexpected mmap in InternalAllocator!"); |
Alexey Samsonov | 1f3c2fe | 2013-05-29 09:15:39 +0000 | [diff] [blame] | 48 | } |
| 49 | void OnUnmap(uptr p, uptr size) const { |
Alexey Samsonov | 845abaf | 2013-05-29 10:41:53 +0000 | [diff] [blame^] | 50 | RAW_CHECK_MSG(0, "Unexpected munmap in InternalAllocator!"); |
Alexey Samsonov | 1f3c2fe | 2013-05-29 09:15:39 +0000 | [diff] [blame] | 51 | } |
| 52 | }; |
| 53 | |
| 54 | typedef CombinedAllocator<PrimaryInternalAllocator, InternalAllocatorCache, |
| 55 | LargeMmapAllocator<CrashOnMapUnmap> > |
| 56 | InternalAllocator; |
| 57 | |
| 58 | void *InternalAlloc(uptr size, InternalAllocatorCache *cache = 0); |
| 59 | void InternalFree(void *p, InternalAllocatorCache *cache = 0); |
| 60 | InternalAllocator *internal_allocator(); |
| 61 | |
| 62 | } // namespace __sanitizer |
| 63 | |
| 64 | #endif // SANITIZER_ALLOCATOR_INTERNAL_H |